Spectra
of the Mg II, C II, and Si IV lines show a spectral
tilt at 02:05:39 UT (Figure REF  panels (i,n,s)). Figure REF  details the spectra of Mg II and Si IV lines for different times 02:05:25 UT and 02:05:39 UT in two slit positions distant of 6\(\mbox{$~\!\!^{\prime \prime }$}\) . The tilt is visible in these two positions, the profiles have dominant
red wings in the southern part of the brightening
(y(pixel) = 50 to 79), they become roughly symmetric
in the middle of the brightening (y = 79) with large extended blue wing nevertheless
and show dominant blue wings in the northern
part with decreasing blueshifts until being symmetrical profiles (y = 79 to 120).
The tilt is well visible in O IV lines, lines in emission identified in the vicinity of Si IV 1402.77 Å  (Table REF ).
We could quantify the displacement of the line according to the position along the slit.
These types of spectra
are well known and are typically associated
with twist ([1]}) or rotation ([2]}; [3]}) or the presence of
plasma in helical structures ([4]}).
The tilt observed in our spectra can be explained by the presence of an helical structure at the base during the reconnection process
due to transfer of twist from a FR in the vicinity of the jet.
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